Roughing and finishing on a single machine, using a single setup, has appeal for most shops. The advantages in time savings and accuracy are obvious. Eliminating the transport of workpieces between machines, as well as the setup for those secondary operations, is a boon for throughput. Critical features that need to maintain dimensional relationships can be much more reliably produced if machined complete in one clamping.
Taper plagues manufacturers of precision wear components such as camshaft and crankshaft bearing journals. Taper is a geometric characteristic that most metal removal processes have a hard time dealing with.
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